This paper takes "how to estimate the complex security of Large Convention and Exhibition Centre effectively" as the research goal.Based on analyzing the difficulties

target system

technical constitution

probing into the architecture

safety science

and using for reference the mathematics

operational research

statistics and modern system theory and method

trying to explore establishing an evaluation methodological system

which is provided with integrated characters on subject.Based on these ways

it exerts "quality to quantity" fuzzy analytical hierarchy process(FAHP) and aims at discussing the safety grade assessment of the Chongqing International Conference Exhibition Center focusing on designing theories.The aim is to enhance the integration of design practice and safe consciousness

strengthen the building safety management

and perfect city public security system.In practice

it is also an efficient tool for favoring values of architectural environmental safety.